(Guardian) – At first, Yury Scherbakov thought the cracks appearing in a wall he had installed in his two-room flat were caused by shoddy workmanship. But then other walls started cracking, and then the floor started to incline. “We sat on the couch and could feel it tilt,” says his wife, Nadezhda, as they carry furniture out of the flat.

Yury wasn’t a poor craftsman, and Nadezhda wasn’t crazy: one corner of their five-storey building at 59 Talnakhskaya Street in the northern Russian city of Norilsk was sinking as the permafrost underneath it thawed and the foundation slowly disintegrated. In March 2015, local authorities posted notices in the stairwells that the building was condemned.

Cracking and collapsing structures are a growing problem in cities like Norilsk – a nickel-producing centre of 177,000 people located 180 miles above the Arctic Circle – as climate change thaws the perennially frozen soil and increases precipitation. Valery Tereshkov, deputy head of the emergencies ministry in the Krasnoyarsk region, wrote in an article this year that almost 60% of all buildings in Norilsk have been deformed as a result of climate change shrinking the permafrost zone. Local engineers said more than 100 residential buildings, or one-tenth of the housing fund, have been vacated here due to damage from thawing permafrost.

In most cases, these are slow-motion wrecks that can be patched up or prevented by engineering solutions. But if a foundation shifts suddenly it can put lives at risk: cement slabs broke a doctor’s legs when the front steps and overhanging roof of a Norilsk blood bank collapsed in June 2015. Building and maintenance costs will have to be ramped up to keep cities in Russia’s resource-rich north running. [more]